On the Spot
A similar situation but with a much older man is the one where an experienced salesman was talking with his employer. The salesman had been performing below expectations for a long period. The employer really wanted to help the salesman and as they were talking asked the salesman to give a few reasons why a customer would want to deal with him.
The salesman was at a loss for words. The employer explained that that may be the problem because the salesman had no reasons why a customer would want to deal with him. The salesman a little agitated said to the employer, "but you have put me on the spot".
The lesson here is not a lesson for salespeople, it is a lesson for everyone. Your life is the "spot". If you cant perform the mental side of your occupation at any given time it is hard to see how you can perform regularly at all.
If you want to get the most out of your work you have to give it the most that you can. Your work is what rewards you so it is important to do something you like and then to be the best at doing that thing as you can.